Carburetor



' fold 2 from the carburetor.

Patented Nov. 8, 1932 narran stares Parenti C. SGJMIDT, OF KEN'O'SHA, WEES'CONSIN, ASSGNQR '0F LONE-HALF TO KENO'SHA DIE & STAMPINZG TATQBKS, 0;;F`KEET'SHA, WISC'fllWSIhT,` A 'CORPORTION 0F WISCONSIN i j GRBURETOR apparent-on mea `-Fetrrmngv 4, 1931. smal nu. masse.

This invention relates to improvements in i 16 is operated.

Another obj ect of the present invention is the provision of a carburetorpattachment of the above character which includes means for controlling an auxiliary supply of fuel to the l5 intake manifold of the motor for providing a comparatively rich mixture at the starting of the motor and decrease the supply as the motor continues to operate for increasing the leanness of the mixture, the device 23 beng thermostatically controlled so that when the engine becomes thoroughly heated, the supply of fuel will be automatically cut down.

Vith the above and other objects in View,

the invent-ion consists in the novel features.

of construction, the combination and arrangement of parts hereinafter more fully set forth, pointed out in the claims and shown in the accompanying drawing wherein:

the application of my improved device;

Figure 2 is a detailed longitudinal section; Figure 3 is a detailed section on the line M 3 3 of Figure 2; and,

Figure 4; is an enlarged side elevation illustrating the thermostatic control device, with parts thereof broken away and illustrated in cross section.

ln the accompanying drawing, I have illus- "3 trated an exhaust manifold of an internal combustion engine and an intake manifold 2. As a general rule, the carburetorv 3 is connected up with the intake manifold and a predetermined amount of fuel is supplied to the mani- In some instances, the supply of fuel from the carburetor to the motor is not sufficient to properly start the motor and the present invention resides in the provision of an attachment for the car- C; buretor to provide an auxiliary supply of fuel Figure 1 is a side elevation illustratingl preferably while the motor is cold in order to' f facilitate the starting of the same.

lThe base Alief the carburetor Shas arranged therein, the usual float A5 and a central tubular member 6. The tubular member 6 in the present inst-ance sprovided with an i.ntc rnailA ly lateral offset 7 and thread-ed into Vthis odset is a tubular member 8 having an internal valve seat 9 and prio-vided with oppositely disposed inlet ports 10. Y

As shown in Figure 2, the 'tubular member 8 extends through an opening in the wali -of the base of the carburetor and is provided `upon the exterior of the carburetor with a shoulder 11 and between the shoulder 11 and the carburetor base is a washer l2 to prevent" leakage of the fuel from the carburetor. Y

Theouter end ofthe tubular member 'is provided with a threaded enlarged portion 13 threaded `interiorly and exteriorly anclmounted upon `the exterior threads, there is a packing vgland, 111.V 1Threaded into the tubular member 8 is a .tubular portion 15 of -the ciosure cap 16 which is .attached to one end of the y inder opposite the closure cap 16 is normallyrr v closed by means of a removable cap 16 and the cylinder is further provided with .spaced outlet nipples 23 and v23 which are exteriorly threaded as shown for engagement with the ,tubular members '24 and 24. and 23 are as illustrated in Figure 2, 'and are The nipples 23,

arranged upon opposite sides of the head A2O when the latter is in its normal position, as shown in Figure 2.

The upper end of the tubular member 24 isattached to an exterior-ly threaded nipple 25 on the lower end of the tubular .member 26.

This tubular member 26 is carried by an attaching plate 27 and is formed by oppositely disposed ports 28 and mounted within *the*M tubular member is a valve 29 adapted to normally cut off communication between the ports 28 and the nipple 25.

Attached to the plate 27 is a thermostatic element 30 having its outer end bearing against the head 31 on the outer end of the valve stem. Mounted upon the valve stem and disposed between the head 31 and one end of the tube 26 is a coil spring 32 which normally urges the valve member to a unseated position upon release of the thermostatic element 80. ,Y

From the above construction taken in connection with the accompanying drawing, it will be readily apparent that when the motor is inoperative,the valve29 is opened,relieving the air space in cylinder 17 between the head 2O and the closure cap 16. This permits the coil spring 21 to urge the valve 19 to an unseated `position, allowing the liquid fuel to pass into the central portion of the carburetor and up through to the intake manifold. I-Iowever, as soon as the motor has been started and the exhaust manifold begins to heat up, the thermostatic element 30` will contract and urge the. valve 29 to a. seated position to limit the movement of the head 20 in the cylinder 19.

However, after the motor has been started, a suction is created through tube 24 which urges the head 2O toward one end of the cylinder against the tension of spring 21 urging the valve 19 toward a closed position, cutting down the auxiliary supply of fuel after the motor has been started and it will be appa-rent that as the speed of the motor increases, the valve 19 will be urged forward towards a seated position, whereby after the motor has reached a predetermined speed, this valve 19 will be closed, so that the motor Will be operated with the regular supply of fuel from the carburetor.

It will be apparent from the foregoing that by attaching this device to the regular type of carburetor, it will provide: for an auxiliary supply of fuel to the intake manifold of a l motor to facilitate the starting of the same, and as soon as the motor has become heated and driven to a predetermined speed, the auxiliary supply of fuel will be cut off.

The device is comparatively simple and it is believed can be attached to various makes of well known carburetors.

While I have shown and described the preferred embodiment of my invention, it will be apparent from the foregoing that slight u changes may be made in the construction when putting the invention into practice withwith the cylinder upon opposite sides of the head, a coil spring on the valve stem between the head and one end of the cylinder, and a thermostatic element for controlling communication with said cylinder upon one side of the head.

2. In a carburetor for internal combustion engines, means for controlling an auxiliary supply of fuel to the engine including an auxiliary fuel inlet port, av valve for said port having a stem, a closed cylinder receiving the stem, a piston secured to the stem slidably mounted in said cylinder, spring means normally tending to hold the valve off of its seat,

lathermostatic controlled atmospheric port for the cylinder on one side of the piston and a suction controlled portrfor the cylinder on the other `side of the piston.

In testimony that I claim the foregoing I have hereunto set my hand at Racine, in the county of Racine and State of Wisconsin.

LESTER C. SCHMIDT. 

